Here's a more sophisticated system that I have.
EDIT
http://www.walstonretrieval.com/main.htm

It has it's own little self contained transmitter of 225 mhz. Uses two little disk type batteries and they will run for 200 hrs in the transmitter from new.

It will not be affected by whatever may happen to the airplane radio.

Also PCM and 2.4 Ghz will not effect it.

You have to pay for your thrills though